We must be reading the OP differently, because I am not sensing this kind of self-aggrandizement in the OP's posts.
What I am reading, is a disproportionate worry about leaving the clinic at the end of the workday when there are still patients being seen. IMO, in an effort to explain her discomfort with this practice, OP has offered up a number of increasingly unlikely "what if" scenarios to justify her worry. Bottom line OP -- you now work in an outpatient setting. If you believe a patient is at risk of a medical emergency, you, one of your providers, or anyone else in the outpatient setting bears the same one responsibility -- to activate emergency response. That's it.
I suggest the following:
1. OP should clarify expectations of her work schedule
2. OP should ask for clarification of the clinic's operations regarding division of duties for nurses and providers
3. OP should ask a preceptor, charge nurse, manager, etc. for some advice and perspective on outpatient care vs. inpatient care, and the differences between them.